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在工业纯Mo表面进行包埋Cr-Si共渗抗氧化涂层,利用扫描电子显微镜(SEM)和能谱仪(EDS)分析涂层的组成和结构,结合热力学分析结果,研究Cr-Si共渗涂层的组织形成机理。结果表明:包埋Cr-Si可在Mo表面形成Cr的硅化物改性涂层,Cr固溶于Mo Si_2或Mo_5Si_3相中,或者在涂层中形成以Cr_5Si_3化合物相;对高温下渗剂反应的热力学分析可知,包埋Cr-Si共渗过程中,含Cr,Si的气相生成物平衡分压比越大,渗入涂层中的Cr含量越高;但随着涂层中Cr含量增加,涂层生长速度降低。
Cr-Si co-infiltration anti-oxidation coating was embedded on industrial pure Mo surface. The composition and structure of the coating were analyzed by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). Combined with the results of thermodynamic analysis, The mechanism of tissue formation of seepage coating. The results show that Cr-Si can form Cr silicide modified coating on Mo surface, Cr solid solution in Mo Si 2 or Mo 5 Si 3 phase, or Cr 5 Si 3 compound phase in the coating, Thermodynamic analysis shows that the embedding Cr-Si co-infiltration process, containing Cr, Si gas phase products of the balance of the partial pressure ratio increases, the higher the amount of Cr infiltrated into the coating; but with the Cr content in the coating increases, Coating growth rate decreases.